package com.sgg.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.sgg.common.R;
import com.sgg.dto.DishDto;
import com.sgg.entity.Category;
import com.sgg.entity.Dish;
import com.sgg.entity.DishFlavor;
import com.sgg.service.DishFlavorService;
import com.sgg.service.DishService;
import com.sgg.service.GategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private GategoryService gategoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();
        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        //执行分页查询
        dishService.page(pageInfo, queryWrapper);
        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId(); //分类id
            //根据id查询分类对象
            Category category = gategoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            return dishDto;

        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString()); 
        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }

//    /**
//     * 根据条件查询对应的菜品数据
//     * @param dish
//     * @return
//     */
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish) {
//
//        //构造查询条件
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
//        //添加条件，查询状态：1起售
//        queryWrapper.eq(Dish::getStatus,1);
//        //添加排序条件
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//        List<Dish> list = dishService.list(queryWrapper);
//
//        return R.success(list);
//    }

    /**
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
           List<DishDto> dishDtoList = null;
           //动态构造key
           String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();

           //先从redis中获取缓存数据
           dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

           if (dishDtoList != null) {
               //如果存在，直接返回，无需查询数据库
               return R.success(dishDtoList);
           }

           //构造查询条件
           LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
           queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
           //添加条件，查询状态：1起售
           queryWrapper.eq(Dish::getStatus,1);
           //添加排序条件
           queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
           List<Dish> list = dishService.list(queryWrapper);
        
           dishDtoList = list.stream().map((item) -> {
                DishDto dishDto = new DishDto();
                BeanUtils.copyProperties(item, dishDto);
                Long categoryId = item.getCategoryId(); //分类Id
                //根据id查询分类对象
                Category category = gategoryService.getById(categoryId);

                if (category != null) {
                   String categoryName = category.getName();
                   dishDto.setCategoryName(categoryName);
                }
                //当前菜品id
                Long dishId = item.getId();
                LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
                lambdaQueryWrapper.eq(DishFlavor :: getDishId,dishId);
                //SQL:select * from dish_flavor where dish_id = ?
                List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
                dishDto.setFlavors(dishFlavorList);
                return dishDto;
        }).collect(Collectors.toList());

            //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
            redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

            return R.success(dishDtoList);
    }
}







































